\fQuestion 4 O Mark this question Find the derivative of f(x) = - 12sinx + x cosx. O f'(x) = 12cosx + 7xcosx +x'sinx O f'(x)= - 12cosx + 7xcosx -x'sinx O f'(x) = - 12cosx - 7xsinx O f'(x)= 12cosx + 7xsinx SAVE & CONTINUEQuestion 8 O Mark this question Find the derivative of f(x) = 2cosx 9x + 16 Of ( X ) = - 2sinx 27x2 O f'(x) = -18x sinx - 32sinx -54x2cosx 9x3+ 16 O F ( x ) = _ 18x sinx + 32sinx + 54x2cosx (9x3 + 16)2 OF ( x ) = - 18x sinx - 32sinx -54x2cosx (9x3+ 16)2 SAVE & CONTINUEQuestion 3 O Mark this question The cost function, C(x), in dollars for producing x units is given by C(x) = 0.17x2+ 25x +650. Approximate the cost of producing the 24th unit by using the marginal cost. O $32.82 $33.16 O $1347.90 O $1314.90 SAVE & CONTINUEQuestion 5 Mark this question Consider the function f(x) = VX near x = - 1. Find the linear approximation error when using the linear approximation to estimate V - 0.75. O -1.82523 O 1.82523 O -0.00811 O 0.00811 SAVE & CONTINUEQuestion 7 O Mark this question 30 7x Find the derivative of f(x) = - 4x3+3x -1 O f'(x)= 21e7x 12x2 + 3 O f(x)= -84x e7* +36x2e7%-63xe7* +30ex (4x3 +3x - 1)2 O f'(x) = 84x e/x -36x2e 7* +63xe 7x-30e 7x (4x 3 +3x-1)2 O f(x) = 84x e * +36x2e7* +63xe7x- 120 7X (4x3 +3x - 1) SAVE & CONTINUE\fQuestion 6 O Mark this question Determine if the function f(x) = Vx is differentiable at x = 0. If not, identify why. O f(x)=Vx is not differentiable at x = 0 because lim Vx does not exist. x + 0+ O f(x) =Vx is differentiable at x = 0. O f(x) =Vx' is not differentiable at x = 0 because f(0) is not defined. O f(x) =Vx' is not differentiable at x = 0 because f'(0) is not defined. SAVE & CONTINUE